A block \( m \) slides down a curved frictionless track, starting from rest. The curve obeys the... VIDEO
A block \( m \) slides down a curved frictionless track, starting from rest. The curve obeys the equation \( y=\frac{x^{2}}{2} \). The tangential acceleration of the block is
(1) \( g \)
(2) \( \frac{g x}{\sqrt{x^{2}+4}} \)
(3) \( \frac{g}{2} \)
(4) \( \frac{g x}{\sqrt{x^{2}+1}} \)
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